slapd should reload config file on signal 1 (ITS#58)

Full_Name: Michael Haardt
Version:
OS:
URL: ftp://ftp.openldap.org/incoming/
Submission from: (NULL) (194.97.109.109)
Many daemons reload their configuration file in reaction to signal 1 (hangup).
It would be great if slapd would do so as well.